Support a second pass collector that counts unique field values of a field per group.
This is just one example of group statistics that one might want.
Uwe Schindler made changes -
|Status||Resolved [ 5 ]||Closed [ 6 ]|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Lucene Fields||New [ 10121 ]|
|Resolution||Fixed [ 1 ]|
|Fix Version/s||4.0 [ 12314025 ]|